propylene glycol has been used as the base for fog machine liquids and in nebulizers for decades.
One key ingredient of the stuff: propylene glycol, a synthetic liquid that absorbs water.
The major point is that we have no studies that show the safety of propylene glycol when inhaled over the long term.
|propylene glycol |
A colorless, viscous liquid used in antifreeze solutions, in hydraulic fluids, and as a solvent. Unlike ethylene glycol, it is not toxic and is also used in foods, cosmetics, and oral hygiene products. Chemical formula: C3H8O2.